I have used EP moly grease on two engine builds. First one I used the sta lube moly grease on a solid flat tappet camshaft/lifters and remainder of the valvetrain. It dissolves into the oil well and no problems during camshaft break in or afterwards. Second engine build with a hydraulic flat tappet cam (NOT for the same car) I went looking for the sta lube moly engine assembly grease but found it was out of stock, picked up a 1 pound can of master pro EP moly grease and used that instead. Same results, successful break in and it dissolved into the oil quickly with no issues or concerns. I'd say that is a viable option for valvetrain assembly at least.